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Prev Professional Automotive Repair Technical Discussions for May 22, 2007
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Open Help Requests for GM
Help Request Answers
1953 Cadillac allard 331CID starter VIN: K33282XXXX
Howdy every one need a little help here. The car is a Allard K3 with a Cadi drivetrain. The starter is not engaging smoothly, If this was a GM pad style I'd start with 3 shims at least. But it mounts like a Ford to the bellhousing. I think the wrong ring gear ...
2001 Cadillac Seville SLS 4.6L Electronic controls VIN: 2G6KS54Y01
Hi guys, thanks in advance. I am trying to help out a good customer. Vehicle has been to the dealer three times for this issue. The customer states the HVAC system will intermittently blow quite warm when it should be blowing cool. If they lower the temperatur...
2004 Cadillac SRX 4.6L Odor from vents VIN: 1GYDE63A54
This is a very strange condition. After driving vehicle for approx. 5-10 min. with the a/c on the customers complains of a propane smells coming out of the dash vents. I was able to duplicate. Checked the drain for the evap case and it is working, we can see w...
1971 Chevrolet monte carlo 5.7L third member VIN: 312B52664G
Hey guys, I am looking for a 4.11 posi rearend that will fit in my 71 monte carlo. If anyone has any recommendations on where to look it would help alot. I have searched the internet and have had no success. If anyone knows of a rearend that will bolt up on th...
1989 Chevrolet S10 Blazer 4.3L No Start, Stall VIN: 1GNCT1820K
Thanks for any help, this one is stumping me. 89 S-10 Blazer 4X4 will start and run for about 30 seconds. When it dies it is like a switch is being flipped. Will idle fine for about 30 seconds then dead. I put the ECM into "limp home" mode with Snap-On Modis a... Trouble codes: 33 (MAP Sensor High), 34 (Map Sensor Low)
1991 Chevrolet V3500 Silverado 6.2L shifting VIN: 1GCHV33N3M
hi all the super tran techs..i recieved the proper tcm today,installed it and now i can get 3rd and 4th after a delay of no drive after second wich comes in very quickly after the truck starts to roll.i have 2 codes now,one is brake on and the other is solenoi...
1992 Chevrolet C3500 Cheyenne 7.4L Hesitation, Surge, Stall VIN: 2GCHC39N71
Engine will always start up, has proper idle flair, drops to base idle then will die. Engine will run on alternative fuel source.
1997 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCCS19X3W
Ok guys this one i cant figure out for nothing. looking for a little guidence. This nightmare came in the shop running really bad at idle with no acceleration. i had a misfire on all the right side cylinders only. So i did what i have done on many of these. to... Trouble codes: P0300, P0135, P0147, P0151
2000 Chevrolet Express 3500 5.7L Misfire, Hard to start VIN: 1GBHG31R8Y
Replaced heads and water pump on 2000 Chevy G3500 express and now is hard to start and will not idle.
2002 Chevrolet Camaro Z28 SS 5.7L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 2G1FP22G52
This is the wifes car. This car is 100% stock except for cart back exhaust. It started running sluggish with noticable sulfuric smell from the tailpipe last Wed. This was shortly after fill up but I have disregarded fuel since we fuel all our vehicles at this ... Trouble codes: P1416 (air system fault bank 2)
2002 Chevrolet Silverado 1500 5.3L battery light VIN: 2GCEK19T72
Customer states, and I verified intermitently the charging system will charge, then not charge. Waring light on dash comes on, and you can see the voltage gauge drop. It will do this at any time for no apparent relationship to engine speed, electrical load, et...
2003 Chevrolet Trailblazer North Face 4.2L Hesitation, no power VIN: 1GNDT13SX3
This SUV came in with NO POWER!! We fould the throttle plate does not open very far. After doing normal fuel pressure and volume tests, and unhook the exhaust in front of the cat. Still have not seen any change. This is when I went on to this site to search th...
2005 Chevrolet Silverado 2500 HD 6.6L Poor Idle Quality, Surge VIN: 1GCHK23265
DURAMAX PEOPLE HELP! dont work on these everyday, engine idle seems to jump up 200 RPM every 10 seconds or so. worse in gear. watch data and most info givin seems to rise up with surge? mpa fuel pressure averages 33,000 and jumps to 76,000 when this happens. s...
1993 GMC Jimmy SLE 4.3L Poor Idle Quality, Poor Fuel Economy
This truck has a rough idle and is getting poor gas milage. Plugs, cap, wires and rotor were replaced before I starting working on it. My scanner will not work on this truck because it is not programmed into it. Have checked for codes manually and none were fo...
1999 Oldsmobile Aurora 4.0L oil light VIN: 1G3GR62C0X
intermittent "red" oil can light along with erratic oil pressure reading on driver information center. removed, oil pressure sending unit located at oil filter addapter housing. pressure reading with analog "shop" gauge is within spec at idle and 2500 r.p.m.. ...
2000 Oldsmobile Alero GLS 3.4L fans on VIN: 1G3NF12E1Y
hi guys; i got this alero with a fan problem car came into shop with a blown head gasket, did the norm but now a noticed that once my temperature reaches 220'f fans will come on & lower temp to 196'f after ten minutes is still on & keeping temp at that temp on...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Century Special 2.2L Hesitation, Surge, Misfire VIN: 1213456789
sorry it took so long but the car is fixed found wirers grounging out under the a/c compresser causing one of the quard driver to fail in witch is all tied into the ING system
1991 Chevrolet Caprice Classic 5.0L Poor Idle Quality, Stall, Misfire VIN: 1G1BN53EXM
Thanks to all for your help and direction. The owner of the vehicle recently installed a new stereo in the vehicle in the process he made a homemade center console for the unit, you guess it one of the screws found the wireing harness and shut the power off or...
1993 Chevrolet K1500 Cheyenne 5.7L Oil Pressure VIN: 2GCEK19K1P
Well folks, after many long nights and a few bad days, it has come down to the customer is going to have to do some repairs to this truck. In an attempt to satisfy him, I replaced the rod and main bearings, which helped the oil pressure cold, but it is still b...
2004 Chevrolet Malibu LS 3.5L Steering VIN: 1G1ZT52824
Thanks to those that replied on this issue. Since I dont have a Tech 2, we took this car to the local GM dealer. They re-calibrated the steering module for the reasonable price of 38.00. As for the two mystery codes I retrieved, I guess we'll never know. The c...
1992 GMC C1500 Sierra SLE 5.0L Hesitation, Surge VIN: 2GTEC19H9N
thanks for all the replies. i had two problems one is the timing .i advanced it ten degrees for my base and that made all the difference and the code is gone...( code 43 by the way)but before i did that i had to replace the egr valve because it was opening way...
2005 GMC Sierra 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTEK19B35
we also ran a 5 gas analyzer to watch hydrocarbons while disconnecting spark plug wires and had no change. also did a running compression test and cyl # 5 would only recover to 50 psi when pushing button on tester. the fix was a broken cyl # 5 exhaust valve sp... Trouble codes: P0300 (random cylinder misfire).
1996 Oldsmobile 88 Royale 3.8L starter circiut VIN: 1G3HN52K3T
guys, much respect and appreciation. special thanks to glen from new jersey who took the time to write a book on this for me. and thanks ronnie, binh and vincent. went under the dash and cut the thin orange sheathing, isolated the pass key circuit, ohmed to ma...
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